Enhancement of energy storage and hardness of (Na0.5Bi0.5)0.7Sr0.3TiO3-based relaxor ferroelectrics via introducing Ba(Mg1/3Nb2/3)O3

Superior energy storage performance in (Bi0.5Na0.5)TiO3-based lead-free relaxor ferroelectrics for dielectric capacitor application via multiscale optimization design

“…With increasing CT content, the T m moves towards a lower temperature and becomes invisible when x $ 0.2 (see Fig. 2(f)), suggesting reinforced site disorder, destroyed the original longrange FE order, diminished the coupling effect of the BO 6 octahedron, and enhanced the relaxation behavior, 28,47,48 which is in line with the Raman spectral analysis. Moreover, one can see that the introduction of CT produces a declined dielectric constant and loss in the whole test temperature range.…”

“…4(b)). The smaller leakage current density will generate fewer charged carriers, 12,99 which which are comparable to state-of-the-art reported lead-free ceramic systems, such as BNT-based (electrical resistivity $150 Â 10 3 U cm at 500 C), 48 BF-based (G a $0.7 mm, E g $2.8 eV, electrical resistivity (400 C) $0.2 MU cm), 8 NN-based (G a $1 mm), 5,20 and AN-based (G a $1.5-2 mm, E g $2.76-2.95 eV, O v /(O v + O L )$0.12) 19,100 ceramics. These achieved good parameters are thought to be responsible for the high E b value, as conrmed from Fig.…”

Realizing high energy density and efficiency simultaneously in (Bi0.5Na0.5)0.7Sr0.3TiO3-based ceramics via introducing linear dielectric CaTiO3

“…3(e 1 ) and (f 1 ) provide the phase images in 0.95BNST-0.05CT and 0.60BNST-0.40CT ceramics after the litho process. As reported in our previous work, 18 for pure BNST ceramics, intense macro-domain formation can be induced at an applied voltage of ±40 V. With increasing CT content, domain switching under the same voltage (±40 V) shows a weakening trend [Fig. 3(e 1 ) and (f 1 )], confirming the existence of delayed saturation polarization.…”

“…(1 À x)Bi 0.5 Na 0.5 TiO 3 -xSrTiO 3 [(1 À x)BNT-xST], as some of the representative dielectric ceramics, have attracted great attention in the eld of high-performance dielectric capacitors due to their high DP (>30.00 mC cm À2 ) and excellent relaxor features. 18,19 However, owing to early polarization saturation and low E b , their W rec values are low (<6.50 J cm À3 ). Namely, (1 À x)BNT-xST relaxor ferroelectrics may become some of the promising candidates for advanced pulsed power systems once the effect of early polarization saturation can be eliminated and the contribution of E b can be enhanced.…”

Disentangling the effect of doping chemistry on the energy storage properties of barium titanate ferroelectrics using data science tools

“…The comprehensive analysis of elemental doping in such a complex system surpasses the scope of the traditional variable control method, both from the experimental and theoretical perspectives such as density functional theory based calculations. 18–20…”